This fuel pressure regulator is engineered to match the function of the original equipment regulator on specified vehicles. It is engineered to help ensure proper fuel injection pressure when the original regulator has failed or is malfunctioning. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Dodge Ram 2500: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Dodge Ram 3500: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Dodge Ram 4000: 2005, 2006, 2007, 2008, 2009]